Compared to ultraviolet waves, the wavelength of infrared waves is

A) shorter.
B) the same.
C) longer.


Answer: C

Physics & Space Science

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How does the Sun's mass compare with that of the planets?

A) It is a hundred times more massive than all the planets combined. B) It is a thousand times more massive than all the planets combined. C) It is about as massive as all the planets combined. D) It is a thousand times more massive than Earth. E) It is a hundred times more massive than Earth.

Physics & Space Science

Ice cream, when eaten, gives about 2100. Calories/kg to the body. On the other hand, the body must give back energy to warm it up to body temperature (37°C). Assuming ice cream has similar thermal properties to water:

(a) 1/2 kg produces how much energy? (b) 1/2 kg absorbs how much energy to reach 37°C? (c) What is the net gain or loss (eating 1/2 kg ice cream)?

Physics & Space Science

Around Sun-like stars, we have, to date, only found Jupiter-like planets

Indicate whether the statement is true or false

Physics & Space Science

Which of the following are active galaxies?

A. quasars B. radio galaxies C. Seyfert galaxies D. All of these choices are correct.

Physics & Space Science